Subtle cinematography and acting throws out a number of interesting things, but they keep extending/repeating the surveillance scenes and don't capitalize on what works. Some ominous hints of karma like its a boogeyman but little exploration of how characters' own motivations may bring about what's attributed to an external force. Movie's a bit like an unsuccessful surveillance job--some interesting things popped up while you were watching, but you didn't really get what you were looking for. DVD extras are some of the most pathetic I've seen and don't add any insight; I doubt anyone asking questions had even seen the movie.